I grew up riding in the back of trucks, riding a bike without a helmet, drinking from the garden hose, before seat belts in autos etc. No body back in those days would wear a mask to do woodworking, except in a few industrial shops. Whether you need a mask depends on what you do. Woodworking is an entire collection of fields of endeavor. Some are great at joinery, cabinetry, carving, turning and others. Depending on what field there are tasks that subject you to varying levels of dust and fumes. Carrying plywood into a shop is not particularly hazardous to breathing. Machine sanding what you make from that plywood certainly is hazardous to breathing. I am primarily a wood turner, although I do some refinishing and furniture repair. Sanding involving a machine, I wear a mask. simple cutting depends on how much dust is generated. On a nice spring day, like today, I have often pushed the table saw outdoors to do production cuts, if the wind is blowing the dust away, I might not wear a mask. There is a simple mask that can be made with a bandanna folded over a few times and shoe laces. Some turners I know actually use old C-PAP machines to provide fresh filtered air from outside the shop, but you are tethered to an inch diameter hose the entire time. Such machines are often prescribed to treat sleep apnea.